Curling iron



FIG. 1 is a perspective view of a curling iron showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 3 is a top plan view thereof; and

FIG. 4 is a bottom plan view thereof, the cord is shown only partially for convenience of illustration.

The side of the curling iron which is not shown is substantially identical to the side which is shown in FIG. 1. 

The ornamental design for a curling iron, as shown and described. 